Alignment of the Silicon Tracking Detector using Survey Constraints

The purpose of this document is to describe an alignment method for the ATLAS silicon inner detector based on survey data taken before the detector components are installed into the ATLAS detector. The method constrains the position of the detector elements locally to what is measured in the survey, taking into account the corresponding statistical and systematic uncertainties. This survey constraint algorithm is implemented as an Athena AlgTool which is supposed to be used in conjunction with any of the other tracking based alignment algorithms.